// In the name of GOD
#include "rainbow.h"
#include <bits/stdc++.h>
#include <ext/rope>
#include <ext/pb_ds/assoc_container.hpp>
#include <ext/pb_ds/tree_policy.hpp>
using namespace std;
using namespace __gnu_cxx;
using namespace __gnu_pbds;
#define BeGood ios_base :: sync_with_stdio(0), cin.tie(0), cout.tie(0);
#define orset tree<int, null_type, less<int>, rb_tree_tag, tree_order_statistics_node_update>
#define nl '\n'
#define ff first
#define ss second
#define sz(x) (int)x.size()
#define all(x) x.begin(), x.end()
#define pb push_back
typedef long long ll;
typedef double db;
const int N = 1e4 + 5;
//const int M = 1e9 + 7;
int a[1111][1111];
void init(int R, int C, int sr, int sc, int M, char *S){
int n = R;
int k = C;
int x = sr;
int y = sc;
int slen = M;
for(int i = 1; i <= n; ++i){
for(int j = 1; j <= k; ++j){
a[i][j] = 0;
}
}
for(int i = 0; i < slen; ++i){
a[x][y] = 1;
if(S[i] == 'N'){
x--;
}
if(S[i] == 'W'){
y--;
}
if(S[i] == 'S'){
x++;
}
if(S[i] == 'E'){
y++;
}
}
a[x][y] = 1;
}
int colours(int ar, int ac, int br, int bc){
int x1 = ar;
int x2 = br;
int y1 = ac;
int y2 = bc;
int b[111][111];
for(int i = x1 - 1; i <= x2 + 1; ++i){
for(int j = y1 - 1; j <= y2 + 1; ++j){
b[i][j] = 0;
}
}
int ans = 0;
for(int i = x1; i <= x2; ++i){
for(int j = y1; j <= y2; ++j){
if(a[i][j] == 0){
int q = 0;
if(b[i][j - 1] == 2 || b[i][j + 1] == 2 || b[i + 1][j] == 2 || b[i - 1][j] == 2){
q++;
}
if(!q){
ans++;
}
b[i][j] = 2;
if(!a[i][j + 1]){
b[i][j + 1] = 2;
}
if(!a[i][j - 1]){
b[i][j - 1] = 2;
}
if(!a[i + 1][j]){
b[i + 1][j] = 2;
}
if(!a[i - 1][j]){
b[i - 1][j] = 2;
}
}
}
}
return ans;
}
Compilation message
/tmp/ccRnXiRC.o: In function `main':
grader.cpp:(.text.startup+0x131): undefined reference to `colour(int, int, int, int)'
collect2: error: ld returned 1 exit status
